If a LDH supply line has burst, is it true that you should close the Keystone and replace the burst section with one section plus a short 30' section if available?

In the scenario where a large diameter hose (LDH) supply line has burst, the correct approach is indeed to close the Keystone valve and replace the burst section with one section along with a short 30-foot section if available. This method is appropriate because the Keystone valve allows for the quick isolation of the affected hose segment, minimizing water loss and maintaining pressure in the remaining system.

Replacing the damaged section with a single standard length hose plus an additional short segment ensures that the line can quickly be put back into service while maintaining adequate pressure and flow to meet fire suppression needs. This repair strategy is efficient and allows for quick operational readiness without needing extensive downtime.

Other approaches might be less efficient or could compromise the integrity of the water supply system in a critical situation. However, this particular method effectively addresses the immediate issue while ensuring that the overall operation continues smoothly.